Acer AOHAPPY2 Aspire One AOD257 and Happy 2 Netbook Service Guide - Page 47

Item Features Specification Meets WLP (Windows Logo Program) requirements for Windows XP, Vista and Windows 7 98dB Signal-to-Noise Ratio (A-weighting) for DAC output 90dB Signal-to-Noise Ratio (A-weighting) for ADC output 4-channel DAC supports 16/20/24-bit PCM format for indepent two stereo channel or 2.1 audio playback 4-channel ADC supports 16/20/24-bit PCM format for indepent two stereo channel audio inputs All DACs support 44.1k/48k/96k/192kHz sample rate All ADCs support 44.1k/48k/96k/192kHz sample rate S/PDIF-OUT support 16/20/24-bit format and 44.1/48/88.2/96/192kHz rate Supports MONO line level output Supports external PCBEEP input and built-in digital BEEP generator Software selectable 2.5V/3.2V VREFOUT as bias voltage for analog microphone input Programmable +12/+24/+36dB boot gain for analog microphone input Supports stereo digital microphone input Programmable boost gain and volume control for digital microphone input Built-in headphone amplifiers for port-C (LINE1) and port-I(HP OUT) Headphone amplifier for port-I does not require DC blocking capacitors Two jack detection pins each designed to detect up to 4 jacks, and S/PDIF-OUT jack detection is supported EAPD (External Amplifier Power Down) is supported Supports Anti-pop mode when analog power AVDD is on and digital power is off Power support: 3.3V digital core power: 1.5V~3.3V digital IO power for HDA link; 3.0V~5.5V analog power; 4.5V~5.5V power stage voltage Enhanced power management features for normal operation and standby mode Stereo Bridge-Tied Load Class-D amplifier at port-D has 2Watt (rms)/4 Ohms per channel output Short circuit and thermal overload protection for Class-D amplifier Class D amplifier has high pass filter with programmable Cut-Off frequency (10Hz~900Hz) to prevent low frequency signal damage speaker Class D amplifier output with slew rate and spread spectrum control to improve EMI performance Independent left and right channel of output power limiter (25%~100% power range) to protect speaker Intel low power ECR compliant: supports power status control, jack detection, and wake-up event in D3 mode Built in a 5V-to-4.5V linear regulator with 60db PSRR to power analog circuitry 48-pin QFN 'Green' package Hardware Specifications and Configurations 1-37